过人洞口是砖混住宅楼施工中,为便于施工人员临时通行和材料水平运输在楼层隔墙上留的通道口,通常是在工程施工后期即将竣工时对其进行封堵和抹灰。由于在封堵和抹灰时操作人员的违规操作,造成了过人洞口在工程竣工后出现“冂”字形裂缝,成为一种常见的质量通病。此质量通病往 Excess openings are the construction of brick and mortar buildings. In order to facilitate the construction workers to temporarily access and material level transport channel openings in the wall of the floor, it is usually closed and plastered immediately after completion of construction. As a result of the illegal operation of the operator during the sealing and plastering, a “冂” shaped crack appeared in the over-manhole after completion of the project, which became a common quality problem. This quality of common problems